After his friend Bertrand Grimany revealed his own relation to the Inquisitor Philippe de Marigny, Teragon was attacked and brutally murdered by Anne de Molay, a living descendant of Jacques de Molay. His body was discovered by his wife, who alerted the authorities.

Shortly after the murder, the Assassin Arno Dorian investigated Teragon's home, found that Teragon's death was a part of a larger conspiracy and used the evidence he found to bring the killer to justice.